Selective herbicide mixtures of substituted phenoxyalkanoic compounds and 3-alkyl-2,1,3-benzothiazinone-(4)-2,2-dioxides and processes

ABSTRACT

Mixtures of herbicidal active ingredients which have a strong selective herbicidal action and particularly suitable for postemergence application, said ingredients including (a) dichlorophenoxyacetic acid, dichlorophenoxy-2-methyl-acetic acid, salts thereof or alkyl or alkoxyalkyl esters thereof and (b) 3methyl, ethyl, propyl or isopropyl-2,1,3-benzothiadiazinone-(4)2,2-dioxide or a salt thereof.

United States Patent [191 [111 3,868,245 Fischer 1 Feb. 25, 1975 SELECTIVE HERBICIDE MIXTURES OF [51] Int. Cl A0ln 9/12 SUBSTITUTED PHENOXYALKANOIC [58] Field of Search 71/91, 92 COMPOUNDS AND 3-ALKYL-2,1,3-BENZOTHIAZINONE-(4)- 1 References Clted 2,2-DIOXIDES AND PROCESSES UNITED STATES PATENTS 75 Inventor; Adolf Fischer, Mutterstadt 3,708,277 1/1973 Zeidlen 71/91 Germany 3,787,198 1/1974 l-lagimoto 71/118 X Assignee: Badische Anilin- & Soda-Fabrik Primary Examiner ]ames Thomas, Jr

Aktiengesellschafi, v Attorney, Agent, or FirmJohnston, Keil, Thompson Ludwigshafen, Rhine, Germany & sh tl ff [22] Filed: Apr. 5, 1973 21 A l N '348190 [57] ABSTRACT PP Mixtures of herbicidal active ingredients which have a Related US. Application Data strong selective herbicidal action and particularly suit- 3] continuatiommpart f Sen 55,277, July 15, able for postemergence application, said ingredients I970, abandoned. including (a) dichlorophenoxyacetic acid, dichlorophenoxy-2-methyl-acetic acid, salts thereof or alkyl or. [30] Foreign Application Priority D t alkoxyalkyl esters thereof and (b) 3-methyl, ethyl, July 24, 1969 Germany 1937551 PmPYl isopropyl'm3'benZthiadiazi""e'(4H3 dioxide or a salt thereof. v v I l [52] US. Cl 71/91, 7l/108, 7l/l09, s c laims, N0 Drawings SELECTIVE HERBICIDE MIXTURES OF SUBSTITUTED PHENOXYALKANOIC COMPOUNDS AND 3-ALKYL-2,l ,S-BENZOTHIAZINONE-(4)-2,2- U DIXIDES AND PROCESSES I Cl O- CH- QOOR where X denotes chlorine or methyl, Y denotes chlorine or hydrogen, R denotes hydrogen or methyl, and R denotes hydrogen, an alkyl radical of l to 8 carbons (methyl, ethyl, isooctyl, isobutyl) or an alkoxyalkyl radical of 4 to 8 carbons (butyloxyethyl), or a carboxylic acid salt thereof, and

b. a compound having the formula where R denotes methyl, ethyl, propyl or isopropyl, or

a salt thereof have a good herbicidal action on broadleaf and grassy weeds when applied postemergence.

Salts of the above compounds include alkali metal (potassium, sodium), alkaline earth metal (calcium, magnesium), amine (C to C (dimethylamine, diethylamine, methylamine) or alkanolamine (C to C (diethanolamine, N-methyl-N-ethanolamine, ethanolamine, N,N-diethyl-N-ethanolamine) salts or 2- chloroethyltrimethyIammonium salts. The ratio of the active ingredients in the mixture to each other is from 5:1 to 1:5, preferably 3:1 to 1:3. The mixtures are applied to the plants at application rates of l to 6 kg per hectare, preferably 2 to 4 kg per hectare.

By postemergence application, we mean the application of the herbicide at a point in time after the seedlings of the crop plants have pierced the surface of the soil. The herbicide may then, for example, be sprayed onto the leaves of the crop plants, onto the unwanted plants or onto the soil (in the loci of the plants). It is not, however, necessary for the seedlings of the unwanted plants to have already emerged.

The agents according'to the invention may be used as solutions, emulsions, suspensions or dusts. The form of application depends entirely on the purpose for which the agents are being used; in any case it should ensure a fine distribution of the active ingredient.

For the preparation of solutions to be sprayed direct. hydrocarbons having boiling points higher than 150C,

e.g. tetrahydronaphthalene or alkylated naphthalenes, or organic liquids having boiling points higher than C and having one or more than one functional group, e.g. the keto group, the ether group, the ester group or the amide group, this group or these groups being attached as substituent(s) to a hydrocarbon chain or being a component of a heterocyclic ring, may be used as spray liquids.

Aqueous formulations may be prepared from emulsion concentrates, pastes or wettable powders by adding water. To prepare emulsions the ingredients as such or dissolved in a solvent may be homogenized in water or organic solvents by means of wetting or dispersing agents, e.g. polyethylene oxide adducts. Concentrates which are suitable for dilution with water may be prepared from active ingredient, emulsifying or dispersing agent and possibly solvent.

Dusts may be prepared by mixing or grinding the active ingredients with a solid carrier, e.g. kieselguhr, talc, clay or fertilizers.

EXAMPLE 1 1n the greenhouse the plants Zea mays, l-lordeum vulgare, Sorghum bicolor, Galium aparine, Stellaria media and Cyperus esculentus were treated at a growth height of 5 to 20 cm with the following amounts of the active ingredients and mixtures thereof listed below:

I 3-propyl-2, l ,3-benzothiadiazinone-(4 )-2,2-dioxide.

2.0 and 3.0 kg/ha; 3-ethyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide,

. l0 and 3.0 kg/ha;

3-methyl-2, l ,3-benzo thiadiazinone-( 4 )-2,2-dioxide, 1.5 and 3.0 kg/ha;

IV sodium salt of 3-isopropyl-2,l ,3,-benzothiadiazinone-(4)-2,2-dioxide, 3.0 and 4.0 kg/ha;

V 2-chloroethyltrimethylammonium salt of 3-isopropyl-2, l ,3-benzothiadiazinone-( 4)-2,2-dioxide. 1.5 and 2.0 kg/ha;

Vl 2-chloroethyltrimethylammonium salt of 3-ethyl-2. l ,3-benzothiadiazinone-(4 )-2,2-dioxide', 2.0 and 4.0 kg/ha;

Vll triethylammonium salt of 3-propyl-2,l,3-benzothiadiazinone-(4)-2,2-dioxide, 2.0 and 3.0 kg/ha;

Vlll sodium salt of 3ethyl-2,l ,3-benzothiadiazinone-(4)-2,2-dioxide, 2.0 and 4.0 kg/ha;

lX sodium salt of 3-propyl-2,l ,3-benzothiadiazinone-(4 )-2,2-dioxide, 2.0 and 3.0 kg/ha;

X 3-isobutyl-2, l ,3-benzothiadiazinone-(4 )-2.2-dioxide,

2.0 and 4.0 kg/ha;

Xl dirrijethylamine salt of a-(2,4-dichlorophenoxy)-propionic act - 1.0 and 3.0 kg/ha;

XlI dimethylamine salt of a-( 2-methyl-4-chlorophenoxy)-propionic acid, 2.0 and 4.0 kg/ha;

Xlll 2,4-dichlorophenoxyacetic acid.

[.5 and 3.0 kg/ha;

XIV sodium salt of 2-methyl-4-chlorophenoxyaeetic acid,

1.0 and 4.0 kg/ha',

XV isooctyl 2,4,5-trichlorophenoxypropionate,

0.5 and 2.0 kg/ha;

XVl amyl 2,4,5-trichlorophenoxyacetete,

L0 and 3.0 kg/ha;

l XI 2.0 10 kg/ha;

ll Xlll 1.0 2.0 kg/ha',

Ill Xlll 1.5 1.5 kg/ha;

[V XlV 3.0 10 kg/ha;

V XV 1.5 0.5 kg/ha;

Vl Xll 2.0 2.0 kg/ha;

VlI XVI 2.0 1.0 kg/ha;

lX X! 2.0 10 kg/ha.

Each individual active .ingredient and mixture thereof was dispersed or emulsified in 500 liters of water per hectare.

3'-isopropy1-2,1 .3-ben zothiadiazinon el 1 2.2-dioxide. 0.25, 0.5. 0.75 and 1.0 kg/ha; V isooctyl 2-(2,4-dichlorophenoxy)-propionate,

0.25, 0.5, 0.75 and 1.0 kg/ha; V11 dimethylarnine salt of 2,4-dichlorophenoxyacetic acid. 9:2. Q.- .015 2nd,} 0

After 8 to 10 days it was ascertained that the mixtures had a herbicidal action superior to that of the individual active ingredients. The results of the experiment after 2 weeks are given in the following table:

kg/ha Zea mays Hordcum vulgare Sorghum bicolor (ialium aparinc Stellaria media Cyperus esculcntus 11 Xll 1.0+2.0

Xll

XVl

XlV

ghum bicolor Galium aparine kg/ha Zea mays Hordeum vulgare Sor Stellaria media Cyperus esculcntus kg/ha Zea mays Hordeum vulgare Sorghum bicolor Galium aparine Stellaria media Cyperus esculcntus kg/ha 0 0 OOOOWO 11 005%00 333 .63 OOOHNU 000550 n -2- -99 000ww5 0005 3- 3-444 Zea mays Hurdcum vulgarc Sorghum bicolor Galium aparine Stellaria media Cypcrus esculentus kg/ha Zea mays Hordeum vulgare Sorghum bicolor Galium aparinc Stellaria media Cyperus csculentus kg/ha Zea mays Hordeum vulgare Sorghum bicolor Galium aparine Stellaria media dimethylaminesalt of 2-(2,4-dichlorophenoxy)-propionic acid, 0.25, 0.5, 0.75 and 1.0 kg/ha;

X sodium salt of 2-(2,4-dichlorophenoxy)propionic acid.

0.25, 0.5, 0.75 and 1.0 kg/ha;

X1 dimethylamine salt of 2-methyl-4-chlorophenoxyacetic acid,

0.25, 0.5, 0.75 and 1.0 kg/ha;

X11 sodium salt of 2,4-dichlorophenoxyacetic acid,

0.25, 0.5, 0.75 and 1.0 kg/ha;

= no damage lllll complete destruction These results show that the mixtures have an unex- 55 1X pected and far superior herbicidal action to that which would have been expected as a result of mere addition EXAMPLE 2 1n the greenhouse various plants were treated at a growth height of 2 to 18 cm with the following amounts Cyperus esculcntus of the herbicidal effects of the individual active ingredients.

I'll-.11

of the following active ingredients and compositions thereof as dispersions After 2 to 3 weeks it was ascertained that the compo- EXAMPLE 3 sitions had a better herbicidal action than their individual components, combined with the same good crop In the greenhouse various plants were treated at a plant compatibility. growth height of 2 to 18 cm with the following active The results of this experiment are given below: 5 ingredients and composition thereof as oil dispersions:

Active ingredient l V kg/ha 0.25 0.5 0.75 l.0 0.25 0.5 0.75 1.0 Hordeum vulgare 0 O 0 0 0 0 0 Triticum acstivum 0 0 0 0 0 0 0 O Secalc ccrealc 0 0 0 0 0 0 0 0 Anthemis arvensis 2O 30 40 60 l0 Chenopodium album 50 70 15 3O '40 65 Chrysanthemum segetum 20 30 40 7O 5 10 15 25 Viola spp. 5 l0 15 20 20 40 5O 65 Active ingredient Vll IX kg/ha 0.25 0.5 0.75 1.0 0.25 0.5 0.75 1.0

Hordeum vulgare 0 0 0 O 0 0 0 0 Triticum aestivum 0 0 0 0 0 0 0 0 Secale cereale 0 0 0 0 0 0 0 0 Anthcmis arvensis 7 10 20 30 40 l0 2O 45 Chenopodium album 20 30 60 l5 2'5 30 40 Chrysanthemum segetum 10 2O 25 3O 10 25 40 55 Viola spp. 20 35 60 15 25 40 60 Active ingredient X Xl kg/ha 0.25 0.5 0.75 L0 0.25 0.5v 0.75 l.0

Hordeum vulgare 0 0 0 0 0 0 0 0 Triticum aestivum 0 0 0 0 0 0 0 0 Secale cereale 0 0 0 0 0 0 0 0 Anthemis arvensis 20 35 10 20 30 40 Chenopodium album 15 35 40 50 20 35 50 70 Chrysanthemum segetum I5 35 40 50 l0 15 20 30 Viola spp. l0 20 25 35 20 30 46 Active ingredient Xll l +V kg/ha 0.25 0.5 0.75 1.0 O.25+O.25 0.75-10.25 O.25+0.75

Hordeum vulgare 0 0 0 0 O 0 0 Triticum aestivum 0 0 O 0 O O O Secale cereale 0 0 0 0 0 0 O Anthemis arvensis l0 15 20 30 65 80 75 Chenopodium album 15 30 40 55 80 95 95 Chrysanthemum segetum l0 '15 2O 30 65 80 75 Viola spp. l5 20 35 40 67 72 90 Active ingredient l Vll l [X kg/ha 0.25+ 0.75+ 0.25+ 0.25+ 0 75+ 0 25 Hordeum vulgare 0 0 0 0 0 y 0 Triticum aestivum 0 0 0 0 0 0 Secale cereale 0 0 0 0 0 0 Anthemis arvensis 65 9O 85 90 9O Chenopodium album 85 100 98 90 92 Chr santhemum segetum 70 85 70 95 Via a spp. 58 70 85 68 73 85 Active ingredient l X l Xl kg/ha 0.25+ 0 75+ 0.25+ 0.25+ 0 75+ 0.25+

Hordeum vulgare 0 0 0 0 0 0 Triticum aestivum 0 0 0 0 0 0 Sec-ale cereale 0 O O 0 0 0 Anthcmis arvensis 75 95 100 70 85 Chenopodium album 78 98 80 98 Chrysanthemum segetum 75 90 97 70 85 90 Viola spp. 50 65 75 65 75 85 Active ingredient l Xll kg/ha 0.25 0.25 0.75 0.25 0.25 0.57

Hordeum vulgare 0 0 0 Triticum acestivum 0 0 0 Sccale cereale 0 0 0 Anthemis arvensis 65 95 80 Chenopodium album 70 85 80 Chrysanthemum segetum 75 95 95 Viola 'spp. 60 7O 74 0 no damage I00 complete destruction Active ingredient 'Vll V111 kg/ha 0.25 0175 1 1.5 0.- 0.75 1.25 1.5

Mntriearizl mnritimu 11) 50 70 1(1 20 30 (iulinm tipzirine 5 15 21 25 15 41) 6O 7O Stellnrin media 3 X 15 20 20 55 70 Lnniinin .nnplexienule 2U 55 80 X0 10 20 30 50 Active ingredient IX X kg/hal (1.25 075 1.25 1.5 0.25 0.75 1.25 1.5

Trilienm nestivnm 0 0 (l 0 0 0 (1 0 Honienm vulgzire (I 0 (I 0 0 0 Secule eerenle 1) (1 (1 0 (1 0 0 0 M1111'1L'21l'11l innritilnn 15 25 3 11) 25 35 (inlinm :ipzirine 1t) 30 70 75 15 41) 60 Stullzirin media 15 40 60 75 15 40 71) [.nniiuni :implexieuule 15 35 5 90 10 20 75 Aethe ingredient 1X kg/hu 0.25 0.75 1.25 1.5

Triticum uestivum 0 0 0 0 Hordenm vulgare 0 0 0 0 Seeaile ecreule 0 0 O 0 Mzitrienriu muritimzi 5 15 30 40 Gzilium upurine 5 15 22 25 Stelluria media 10 18 25 35 Lzimium uinp1exieuu1e 20 6O 85 90 Active ingredient 1 V11 1+ V11 kg/hn 0.25+ 1.25+ 075+ 025+ 125+ 075+ T1111CL1I11 nestivnm 0 0 0 0 0 0 Hurtleum vulgure 0 0 0 0 0 0 Seenle cerenle 0 0 0 0 0 0 Mntricurin mtiritimu 85 90 95 80 87 90 6211111111 zip-urine 80 98 100 100 100 100 Stelluriu media 86 90 90 100 100 100 Lumium umplexieuule 100 95 100 78 95 90 Active ingredient 1+ 1X 1+ X kg/htl 025+ 125+ 0.75+ .25+ 1.25+ 0.75+

Tritieum tiestivuni 0 0 O 0 O O Hordeum vulgare 0 0 O 0 O 0 Secnle cereule 0 0 0 0 0 0 Mutrienriu mziritima 95 97 92 80 87 82 Gallium upurine 100 100 100 100 100 100 Stelluriai media 100 100 100 100 100 100 Lumium aimp1exieau1e 100 95 98 100 90 86 Active ingredient 1+ X1 11+ V11 kg/hu 025+ 1.25+ 075+ 025+ 125+ 075+ Tritienm uestivum 0 0 0 0 0 0 Hnrdeum vulgure 0 0 0 0 0 O Secnle ecrenle 0 O 0 0 0 0 Matrienriu muritimzi X0 90 83 95 93 95 Gnlinm .ipzirine 1'16 97 95 75 100 90 Stellnrin media 85 100 92 87 Luniinm umplexienule 100 94 100 100 85 100 Active ingredient 11 V111 11 +1X k t/1m 0.25+ 1.25+ 075+ 025+ 1.25+ 075+ Trilicum aestivum 0 0 0 0 0 0 Hordeum vulgzire 0 0 0 0 0 0 Seculc cerenIe 0 0 O 0 0 0 Mutricurin muritinia 77 87 90 90 96 93 Gulium upurinc 100 100 100 100 100 100 Stelluriu media 97 100 100 100 100 100 Lnmium amplexieaule 70 73 98 97 94 Active ingredient 11 X 11 X1 kg/hn (1.25+ 125+ 075+ 025+ 1.25+ 0.75+

Tritieum ziestivum 0 0 0 0 0 0 Hordeum vulgare 0 0 0 0 0 0 Seenle cereule 0 0 O 0 0 O Mutricurin mziritimu 77 90 80 70 90 Gnlinni upnrine 100 100 100 75 100 Stellnrizt media 95 97 100 77 86 90 Lumium umplexicaule 90 76 100 90 100 Active ingredient kg/ha Triticum aestivum Hordeum vulgare Sccale cereale Matricaria maritima Galium aparine Stellaria media Lamium amplcxicaule Active ingredient kg/ha O 0 0 100 I00 I00 83 0 O 0 I00 100 I00 95 'I'rilicum acativum Hmdenm uulgare Scenic ccrcale Matricaria marilima Galium aparine Stellaria media Lamium amplexicaule IV VII I00 I00 I00 95 I00 90 I00 I00 IV IX I00 100 100 100 I00 I00 95 100 IV XI sodium salt of 2-(2,4-dichlorophenoxy)-propionic acid. 1.0. 3.0. 5.0 and 60 kg/ha; XI dimethylamine salt of 2-methyl-4-chlorophenoxyacetic acid.

1.0, 3.0. 5.0 and 6.0 kg/ha;

IV VIII (125+ 125+ no damage EXAMPLE 5 In the open various plants were treated at a growth height of 2 to 18 cm with the following amounts of the 50 Active ingredient kg/ha Triticum aestivum Hordeum vulgare Secalc ccrealc Matricaria maritima Galium aparine Stellaria media Lamium amplexieziule Active ingredient kg/ha Tritieum aestivum Hordeum vulgare Sccale cereale Matricaria maritima Galium aparine Stellaria media Lamium amplcxieaulc Active ingredient kg/ha Tritieum aestivum Hordeum vulgare Secale eereale Matriearin maritima Galium aparine Stellaria media Lamium amplcxieaule complete destruction a a a a a hhhhh gy kkkkh O oooo mmmmmm m mmmmmm N-3 .4-dichIorophenyl-N '.N -dimcthylurea.

m+++++++++++++++++++++ 0 .000000000000000000 0 ll l l 11111115. 0

mhIH IHH IHm IHm WV I XXVWMXXVVmxxvvmxml 5+++++++++++++++++++++ EXAMPLE 6 1n the greenhouse various plants were treated at a growth height of 3 to 25 cm with the following amounts of the following active ingredients and compositions 5 thereof as dispersions or emulsions.

plication rates 0.25+1.25. 1.25+0.25 and 0.75-H175 kg/ha had a better herbicidal action that active ingredients 1 to IV and X11 combined with the same good crop plant compatibility. Compositions 1+X1I1, 11+X111. 111+Xl11 and lV+Xlll at the application rates l.0+5.0, 5.0+] .0 and 3.0-1-30 kg/ha had better crop plant com- 3 isopropyl-2.1.3-bcnZothiadiazinne-(4)-2 .2-dioxide.

0.25. 0.75. 1.0. 1.25. 1.5.3.0. 5.0 and 6.0 kg/ha;

11 sodium salt of 3-isopropyl-2.l.3-benzothiadiazinone-(4)- 2.2-dioxide.

11 +Xlll +Xlll +Xlll After 2 to 3 weeks it was ascertained that the compositions 1+X111. 11+X111, 11l+X11l and lV+Xlll at the ap- 30 Active ingredient patibility than XV and the composition XV+1.

The results are given below:

kg/liu 0.25 0.75 1.0 1.25 1.5 3.0 5,0 0.0

()ryzai saliva 0 0 0 0 0 0 5 Alistntt plantago 35 50 55 (i5 75 80 100 100 BldLns pilosu 50 (10 80 100 100 100 Cyperus eseulentus 65 65 73 80 90 100 100 Cyperus rotundus 40 60 65 70 S0 100 100 100 Active ingredient 11 kg/ha 0.25 0.75 1.0 1.25 1.5 3.0 5.0 6.0

Oryza sativa 0 0 0 0 0 0 5 10 Alisma plantago 30 40 50 60 70 80 100 100 Bidens pilosa 15 35 55 75 100 100 100 Cyperus csculentus 15 30 45 70 90 100 100 Cyperus rotundus 10 30 40 53 70 90 100 100 Active ingredient 111 kg/ha 0.25 0.75 1.0 1.25 1.5 3.0 5.0 6.0

Oryza sativa 0 0 0 0 0 0 4 10 Alisma plantago 28 40 53 65 72 80 100 100 Bidens pilosa 10 35 40 50 78 100 100 100 Cyperus esculentus 14 30 48 55 67 95 100 100 Cyperus rotundus 10 25 50 57 80 95 100 100 Active ingredient 1V kg/ha 0.25 0.75 1.0 1.25 1.5 3.0 5.0 6.0

Oryza sativa 0 0 O 0 0 0 7 15 Alisma plantago 30 50 55 60 70 80 100 100 Bitlens pilosa Z0 40 50 80 100 100 100 (yperus escnlentus 15 35 50 55 )0 100 100 (yperus rutnndus 10 30 40 55 )8 100 100 Active ingredient X111 kg/lm 0.25 0.75 1.0 1.35 1.5 3.0 5.0 on 5.0 on

()ryza SilllVtl 0 0 0 0 0 10 .10 45 100 100 Alismn plantago 15 40 50 (i0 70 75 )5 100 100 100 BlLlCHS piles-.1 l0 25 M1 50 70 H0 )5 1110 100 100 ('yperus esculentus 2 8 10 10 15 1X 25 30 100 100 Cyperus rotundus 0 Z 5 7 10 12 15 20 100 100 Active ingredient 1+X111 kg/ha 0.25-1- 1.25+ 075+ 1.0+ 5.0+ 3.0+

Oryza sativa 0 0 0 30 6 15 Alismn plantago 100 100 100 I00 100 100 Bitlens pilosa 97 100 100 100 Cyperus esculentus 90 100 100 100 100 100 Cyperus rotundus X5 )5 )8 100 100 100 Active ingredient l+Xl kg/ha 0.25-+0.25 0.75+0.25 0.25+0.75

Triticum aestivum O O Hordeum vulgare 0 0 0 Secale cereale 0 O 0 Matricaria maritima 60 v 90 Galium aparine 50 70 (ii) Stcllaria media 55 80 Lamium amplexicaule 60 80 95 0 no damage I00 complete destruction EXAMPLE 8 I ll] dimethylamine salt of 3-isopropyl-2.l.3-benzothiadiazinonw (4)-2.2-dioxidc. In the greenhouse various plants were treated at a 02101075 and L0 k growth height of 2 to 18 cm with the following amounts V iisoostyl t y)-P P f th f H i d l5 0.25. 0.5. 0.75 and 10 kg/ha; o c O 0 wmg we ngre Km 5 compos' Vl dimethylamine salt of 2.4.5-trichlorophenoxyacctic acid. thereof as dispersions: 0.25. 0.5.0.75 and 1.0 kg/ha:

Vll dimethylamine salt of 2.4-dichlorophenoxyacetic acid.

ll sodium salt of 3-|sopropyl-2.l.3-hcnzothiadiazmone-(4)- 0'25 05 0'75 and H) kg/ha;

0.25 0.75 and 1.0 g/ lll :llgitbethyl lmlllt, \lil of methyl chlorop enoxy) propionic X sodium salt of 2-(2.4 dichlorophenoxy)-propinnic acid. 0.25. 0.5. 0.75 and L0 kg/hu:

0.25. 0.5. 0.7 a L0 80 Xl dimethylamine salt of 2-methyl-4-ehlorophenoxyacetic acid. II X 0.25 0.25. 0.75 0.25 and 0.25 0.75 kg/ha. 0.25, 0.5. 0.75 and 1.0 kg/ha;

After 2 to 3 weeks it was ascertained that the composition had a better herbicidal action than its individual II] V 0.25 0.25. 0.25 0.75 and 0.75 0.25 kg/hu; components, combined with the same good crop plant V! 0.25 (M25. 025 M1075 (7-25 g/ha: c m atibilit Ill Vil 0.25 0.25. 0.25 0.75 and 0.75 0.25 kg/hat; o P lll vm 0.25 0.25. 0.25 0.75 and 0.75 0.25 kg/ha; The results of this experiment are given below: lll XI 0.25 0.25. 0.25 0.75 and 0.75 0.25 kg/ha.

Active ingredient ll X kg/ha 0.25 0.5 0.75 1.0 0.25 0.5 075 L0 Triticum aestivum 0 0 0 0 0 0 0 0 Hordeum vulgare 0 0 0 0 0 0 0 0 Secale cereale 0 0 0 O 0 0 0 0 Matricaria maritima 10 25 35 55 3 5 I0 20 Galium aparine 15 40 60 15 4O 50 Stellaria media 10 20 30 45 15 35 Lamium amplexicaule 5 l0 I5 25 l0 I5 20 45 Active ingredient II X kg/hlt 0.25-i025 07510.25 0.25-i075 Triticum aestivum 0 (I 0 Hordcum vulgare 0 0 0 Secale cereale 0 (I 0 Matricaria maritima 75 Galium aparinc 6O 95 90 Stellaria media (:0 88 85 Lamium amplcxicaule 50 60 60 0 no damage I00 complete destruction EXAMPLE 9 After 2 to 3 weeks it was ascertained that the compoln the open various plants were t eated t a growth sitions had a better herbicidal action than their individheight of 2 to l8 cm with the following amounts of the 50 11111 Components, Combined With the Slime 8 l 'following active ingredients and compositions thereof P compatlblmyas emulsions: The results are given below:

Active ingredient Ill V kg/ha 0.25 0.5 0.75 1.0 0.25 0.5 0.75 1.0

Triticum aestivum 0 0 0 0 0 0 0 0 Hordeum vulgare 0 0 0 0 0 0 0 0 Secale cereale 0 0 0 0 0 0 0 0 Matricaria maritima I5 30 45 10 25 30 45 Galium aparinc 20 30 4O 50 20 35 50 Stellaria media l0 20 35 50 I5 25 35 50 Lamium amplexicaule 5 i0 20 40 20 30 45 55 Active ingredient VI VII kg/ha 0.25 0.5 0.75 H) 0.25 0.5 0.75 1.0

l'riticum aestivnm 0 0 0 0 0 0 0 0 Hordeium vulgare 0 0 0 0 0 0 0 0 Sccale cereale 0 0 (l 0 0 0 (l 0 Matricaria maritima I0 20 40 55 i0 l 30 40 Gulium aparinc I5 30 45 70 5 l0 15 20 Stellaria media 5 l0 16 20 3 8 l0 5 Lamium amplexicaule 20 40 60 X5 20 35 55 Active ingredient Vlll Xl kg/ha 0.25 0.5 0.75 1.0 0.25 0.5 075 L Triticum aestivum 0 0 0 0 0 0 0 0 Hordeum vulgare 0 0 0 0 0 0 0 0 Secale ccrealc 0 0 O 0 0 0 0 0 Matricaria maritima l0 I 5 l0 15 25 Galium aparine 15 40 50 5 I l0 I5 20 Stellaria media 20 l0 l5 IX 20 Lamium amplexicaule l0 15 20 25 20 30 80 Active ingredient lll V lll V] kg/hu 025+ 0.75+ 025+ 025+ 075+ 015+ Triticum aestivum 0 0 0 0 0 0 Hordeum vulgare 0 0 0 (l 0 0 Secale cereale 0 0 0 0 0 0 Matricaria maritima 95 X0 (13 X0 00 Galium aparine 80 98 100 (I5 )0 )7 Stellaria media 90 X0 60 8o 70 Lamium amplexicaule 66 90 (i5 70 )5 Active ingredient lll V" lll Vlll kg/ha 025+ 0.75+ 025+ 025+ 075+ 0.25

Triticum aestivum 0 0 0 0 0 0 Hordeum vulgare 0 0 0 0 0 0 Secale cereale 0 0 0 0 0 0 Matricaria maritima 65 100 65 95 70 Galium aparine 60 X5 70 70 I00 95 Stellaria media 40 77 55 65 I00 Lamium amplexicaule 75 80 95 50 70 (:0

Active ingredient Ill Xl kg/ha 0.25+0.25 0.75-i025 0.25+0.75

Triticum aestivum 0 0 0 Hordeum vulgare 0 0 0 Sccale cereale 0 0 0 Matricaria maritiina (15 H5 75 (ialium aparine (i0 80 70 Stellaria media 55 R5 (15 Lamiuin amplexicaule 75 75 5 t) no damage 100 complete destruction EXAMPLE l0 IX tlimethylaminc salt oi 2 (2.4-dichlorophenoxy)-propionic acid,

40 0.25. 0.5. 0.75 and I0 kg/ha;

In the open various plants were treated at a growth IX r 015 111140-75 /hu. height of 2 to 25 cm with the following amounts of the following active ingredients and composition thereof as an aqueous solution:

After 2 to 3 weeks it was ascertained that the composition had a better herbicidal action than its individual "I i h I l f x V p l H l r components, combined with the same good crop plant t unet amine sa t o unspmpy venzot tun lazmonc- 45 I HHMHMMC' (.Ompdt|hllll.).

0.25. 0.5. 0.75 and 1.0 kg/ha; The results of this experiment are given below:

Active ingredient lll lX kg/hu 0.25 0.5 0.75 1.0 0.25 0.5 0.75 1.0

Zea mays 0 0 0 0 0 0 0 0 Galium aparine 20 30 40 50 H! 20 30 b5 Matricaria maritima I5 30 45 b5 15 25 25 40 Lamium amplexicaule 5 I0 20 40 I5 25 35 (\0 (ypcrus dilTormis l0 2. 40 00 I0 20 2h 35 Cyperus rotundus l0 la 30 45 5 10 lb 15 Active ingredient lll l)\' kg/ha 0.25H).25 0.75-+0.25 0.25 0.75

Zea mays 0 0 0 Galium aparine 65 X5 Matricaria maritima 70 )5 Laminum amplexicaule 00 70 9t) Cyperus difl'ormis (\0 X5 80 Cyperus rotundus 50 70 on 0 11 no damage I00 complete destruction EXAMPLE 11 In the greenhouse various plants were treated growth height of2 to 20 cm with the following amounts of the following active ingredients and composition thereof as pastes:

ata

After 2 to 3 weeks it was ascertained that the composition had a better herbicidal action than its individual components, combined with the same good crop plant In th of the EXAMPLE 12 c greenhouse various plants were treated at a 5 growth height of 2 to 22 cm with the following amounts following active ingredients and composition thereof as dusts:

lll

Xll

111 Xll dimethylamine salt of 3-isopropyl-2,l.3-benzothiadiazinone- (4)-2,2-dioxide, 0.25, 0.5, 0.75 and 1.0 kg/ha; sodium salt of 2.4-dichlorophenoxyacetic acid, 0.25. 0.5, 0.75 and 1.0 kg/ha;

0.25 0.25, 0.25 0.75 and 0.75 and 0.75 0.25'kg/ha.

After 2 to 3'weeks it-was ascertained that the composition had a better herbicidal action than its individual components, combined with the same good crop plant (1 no damage 1111) com lete destruction compatibility. compatibility.

The results are given below: 20 The results are given below:

Active ingredient lll kg/ha 0.25 0.5 0.75 1.0 0.25 0.5 0.75 1.0

Triticum aestivum 0 0 0 0 0 0 0 Hordeum vulgare 0 0 0 0 0 0 0 0 Secale cercale 0 (l 0 0 0 O 0 0 Anthemis arvensis 20 30 40 (10 5 Chenopodium album 50 70 20 30 45 6O Chrysanthemum segetum 20 30 70 10 20 27 30 'Lamium amplexicaule l0 15 30 40 10 15 20 Active ingredient lll X kg/ha 0 25+0.25 0.75+0.25 0.25-H175 Triticum aestivum 0 O 0 Hordeum vulgare 0 0 Secale ccreale 1) (l t) Anthemis arvensis 80 Chenopoddium album 80 100 100 Chrysanthemum segetum 70 85 84 Lamium amplcxicaule 55 70 (l no damage, 11111 complete destruction Active ingredient 111 Xll kg/ha 0.25 0.5 0.75 1.0 0.25 0.5 0.75 1.0

Triticum aestivum 0 0 O 0 0 0 O 0 Hordeum vulgare O 0 0 O 0 0 0 0 Secale cereale 0- 0 0 0 0 0 0 O Anthemis arvcnsis 20 30 40 60 10 15 20 30 Chenopodium album 25 30 50 70 15 30 4(1 55 Chrysanthemum segetum 20 30 40 70 l0 15 21) 3O Lumium amplexicaule 10 15 3t) 40 15' 20 35 45 Active ingredient 111 Xll kg/ha 012M025 0175-1025 (1154-075 Tritieum aestivum 0 0 Hordeum vulgare 0 0 Secale cereale 0 0 0 Anthemis arvensis 65 85 Chenopodium album 75 95 88 Chrysanthemum segetum 67 75 Lamium amplexicaule 6U 87 85 EXAMPLE l 3 IV diethanolamine salt of B-isopropyl-Z, l .3-hen20thiadiawinone-( 4 )-3.Z-dioxide. In the greenhouse various plants werre treated at a 015-01075 and W kglhlll 7 '3 growth heIght 3 to l cm with the lollowlng amounts w g 2; 7 2 1 1 5 i fiij i l oithe following active ingredients and Composition 5 VII dimethylamine salt of 2.4-dichlorophenoxyacetic acid.

)f S t 0 25. 05. 0.75 and 1.0 leg/ha; thLru d lspt'r Ions Vlll tltmethylamine salt ot I ll] dimethylumine salt of 2( 2-methyl-4-chlorophenoxy)-propiontc acid.

3-isopr0pyl-2,l,3-benzothiadiazinone-(4)2.Z-dioxide, 0.25. 0.5. 0.75 and I.() kg/hll: 0.25, 0.5. 0.75 and kg/ha; lX dimethylamine salt of Z-t2.4-dichlorophcnox l-propionic XlV diethanolamine salt of 2-methyl-4-chlorophenoxy-propionic acid. 0.2. 0.5. 0.75 and L0 kg/ha: 0.25, 0.5, 0,75 and l kg/ha 10 XI diemthylamine salt of Z-niethyl-4-ehlorophenoxyaeetit acid. 0.2.5. 0.5. 0.75 and 1.0 kg/ha;

Ill xiv 0.25 0.25. 0.25 +0.75 5,010.75 0.25 kg/ha.

After 2 to 3 weeks it was ascertained that the composition had a better herbicidal action than its individual u 035 +011 025 75 and 75 kg/M components, combined with the same good crop plant W VI] 025 0.25. 0.25 +0.75 and 0.75 0.25 kg/ha; com I [V VlIl 0.25 0.25. 0.25 +0.75 and 0.75 0.25 kg/ha; iv 1x 0.25 +0.25. 0.25 +0.75 and 0.75 +0.25 kg/ha; The results are given below: W XI 0.25 0.25. 0.25 +0.75 and 0.75 0 25 kg/ha Active ingredient lll XIV kg/ha 0 0 5 0.75 l 0 0 25 0.5 0 75 l 0 Festuca app. 0 0 0 0 0 0 0 0 Lolium spp. 0 0 0 0 0 0 0 0 Poa spp. 0 0 0 0 0. 0 0 0 Ranunculus spp. l0 15 20 25 20 Rumex acctosa 5 l0 15 20 I5 20 27 35 Active ingredient lll XlV kg/ha 0.25+0.25 0.75-i025 0.254075 Festuca spp. 0 0 0 Lolium spp. 0 0 0 Poa spp. 0 0 0 Ranuneulus spp. 05 X0 90 Rumex acetosn (i0 70 (15 0 no damage I00 complete destruction.

EXAMPLE 14 After 2 to 3 weeks it was ascctained that the compo- [n the Open various plants were treated at a growth sitions had a better herbicidal action than their individheight of 2 to 19 cm with the following amounts of the 40 l f h combined with'the same good Crop following active ingredients and compositions thereof plant compltlblhty as spray solutions: The results are given below:

Active ingredient IV V] kg/ha 0.25 0.5 0.75 1.0 0.25 0.5 0.75 1.0

Hordeum vulgare 0 0 0 0 0 0 0 0 Triticum aestivum 0 0 0 0 0 0 0 0 Secale cereale 0 0 0 0 0 0 0 0 Matricaria maritima l5 maritirna 70 I0 20 40 Galium aparinc 25 35 45 65 I5 30 45 7O Stellaria media 10 20 40 5 l0 16 20 Lamium amplexicaule 6 l5 25 35 20 40 ()0 85 Active ingredient Vll Vlll kg/ha 0.25 0.5 0.75 [.0 0.25 0.5 0.75 1.0

Hordeum vulgare 0 0 0 i 0 0 0 0 0 Triticum aestivum 0 0 0 0 0 0 0 0 Secale cereale 0 0 0 0 0 0 0 0 Mutricaria moritima I0 20 30 40 I0 15 20 25 Galium aparine l0 15 20 I5 30 40 50 Stellaria media 3 5 8 10 20 35 4t) 45 Lamium aniplexicaule 20 35 5. 80 l0 I5 20 25 Active ingredient lX Xl kg/ha 0.25 0.5 0.75 1.0 0.25 0.5 0.75 1.0

Hordeum vulgare 0 0 0 0 0 0 0 0 Triticum aestivum 0 0 0 (l 0 0 0 0 See-ale cereale 0 0 0 0 t) 0 0 0 Matricaria maritima I5 20 25 40 5 l0 I5 25 Galium aparine 10 20 30 5 l0 l5 2() Stcllaria media 15 30 40 .55 l0 l5 I8 20 Lamiurn amplcxicaule 15 25 35 (i0 20 30 8t) Active ingredient IV VI kg/ha 25+0.2 0 75+0.25 (HS-I075 Hordeum vulgare 0 0 0 Triticum ucstivum 0 0 0 Secule ccreule O 0 0 Matricnriu maritima 65 95 0: (ialium upurine v 75 92 I00 Stelluria media 60 90 05 Lumium amplexicaule 65 85 95 Active ingredient l\' \"II kg/hu 0 +0.25 0.75+0.Z5 025-1075 Hordeum vulgare O 0 0 Triticum aestivum 0 0 0 Seeale cereule 0 0 0 Matricuriti maritima 70 98 I00 Galium aparine 70 85 80 Stellariu media 60 80 60 Lamium amplexieuule 60 85 95 Active ingredient IV VIII kg/hu 0 25+O.25 0.75+0.25 0.' 5+0.75

Hordeum vulgare 0 0 0 Triticum nestivum 0 0 0 Secale cereule 0 0 0 Mutricariu muritimu 70 95 75 Galium uparine 80 I00 I00 Stellaria media 70 98 90 Lzimium umplexicaule 55 65 67 Active ingredient IV +IX kg/ha 0 5-1025 0.75+0.25 0.25+0.75

Hordeum vulgare 0 0 0 Tritieum uestivum 0 0 0 Secale cereule 0 0 0 Matriearia maritimzt 75 I00 95 Galium apzireine 75 95 95 Stellarin media 65 90 90 Lamium amplexieuule 6O 85 90 Active ingredient IV -I- XI kg/ha 0 25+0.25 0.75+0.25 0.25-H).75

Hordeum vulgare 0 0 0 Triticum nestivum 0 0 0 Seenle cerenle 0 0 (1 Matricurin mnrilinm 0i] )5 70 (inlium :lpurine 70 )0 85 Stellzu'ia media (15 95 70 I.;1n11n111 :tniplcxit'nnle 70 R5 )5 (I lin tlmunpc I00 tmn vlcledesuueliuli EXAM PLE I5 IX dimethylamine salt of 2-(3.40ichlorophenoxyl-prupinnie acid. In the open. various plants were treated at a growth 10. 2.0. and kg/hu: ,7 I I Q hught ot F the followmg arnountb of the XI dimethylamine salt of2-methyl-4-ehlorophenoxyaeetic acid. followmg active ingredients and composmons thereof 1.0. 2.11. 3.0 and 4.0 kg/ha; as aqueous solutions:

I 1v+v1 30+10. I.0+3.0;.1nd 1.0+1.0 kg/ha Iv lhgthunolumme $111! M I I I 1v VII 3 0 1 0, 1.0+ 3.011110 10 1.0 kg/hn 3-|sopropyl-2.l.3-benzoth1a1dn1z1none-(4)-2.2-d1ox1de. so [V VIII 1 0 l 0, l.() 3.0 and L0 [.0 kg/hn Ht 30111111 ks/ha; W IX 10 10. 1.0 3.0 and 1.0 1.0 kg/ha IV XI 10+ I 0, 1.0 3.0:111d 1.0+ I.0kg/h;1

VI dimethylamine salt of Z.4.S-triehloruphenoxyacetic acid,

1.0. 2.0, 3.0 and 4.0 kg/htt;

After 2 to 3 weeks it was ascertained that the compositions had better crop plant compatibility than active ingredients IV to IX and XI at the application rate of -4 kg/ha.

The results of this experiment are given below:

VII dimethylamine salt of 2,4-dichlorophenoxyacetic acid,

1.0. 2.0. 3.0 and 4.0 kg/ha;

\'III dimethylamine salt of 2-(2-n1ethyl--I-chlorophenoxy)-propionic acid.

1.0. 2.0. 3.0 and 4.0 kg/hu'.

Active ingredient IV VI kg/htl 1.0 2.0 3.0 4.0 L0 2.0 3.0 4.0

Triticnnt aestivum 0 0 0 0 0 0 I0 25 Mtitricarin mnritimn I00 I00 I00 55 I00 100 I00 Lamium timplexienule 15 70 I00 I00 100 Active ingredient I kg/hu 1.0 1.0 3,0 4.0 I .0 3.0 3.0 4.0

'I'ritieum nestivum 0 0 5 20 0 0 5 Matriearia niuritimn 40 70 I00 15 40 00 H0 [.aniium umplexicnule X0 )0 I00 I00 25 (v0 70 )5 -Continued Active ingredient IX .\l kg/ha [.0 2.0 3.0 4.0 l.0 2.0 3.0 41) Tritieum aestivum O 5 I5 20 0 I0 25 Matricaria maritima 40 80 90 I00 25 40 (at) 70 Lumium amplexicaule 60 85 90 I00 80 I00 I00 Active ingredient IV V] kg/ha 3.0+] .0 l.0+3.0 l.0+l .0

Triticum aestivum 0 l0 0 Matricaria maritima I00 I00 I00 Lamium amplexieaule I00 I00 I00 Active ingredient W Vll kg/ha 3.0+].0 l.0+3.0 I.0+l.0

Triticum aestivum 0 5 Matriearia maritima I00 I00 I00 Lamium amplexicaule I00 I00 I00 Active ingredient W VIII kg/hu 3.0+l.0 l.0+3.0 l.0+l.0

Triticum aestivum 0 5 0 Matricaria maritima I00 I00 I00 Lamium amplexicaule I00 I00 95 Active ingredient W IX kg/htt 3.0+] .0 l.0+3.0 l.0+l .0

Triticum aestivum 0 l5 0 Matricaria maritima I00 I00 I00 Lamium amplexicaule I00 I00 I00 Active ingredient IV XI kg/ha 3.0+] .0 l.0+3.0 I.0+I.()

Triticum ucstivum 0 l0 0 Matricaria maritima I00 I00 I00 Lamium amplexicaule I00 I00 I00 0 damage I00 complete destruction EXAMPLE l6 In the greenhouse, various plants were treated at a growth height of 2 to cm with the following amounts of the following active ingredients and compositions 0 and 0.75 0.25 kg/ha. had the same crop plant compatibility as. and a better herbicidal action than. active thereof in the form of granules: IV diethanolamine salt of 3-isopropyl-2,l,3-benzothiadiazinone(4)-2,2-dioxide,

0.25, 0.5, 0.75, 1.0, 2.0, 3.0 and 4.0 kg/ha;

acid.

0.25, 0.5. 0.75, 1.0, 2.0, 3.0 and 4.0 kg/ha;

35 IV Xlll 0.25 0.25. 0.25 0.75. 0.75 +0.25. 3.0+

1.0 3.0 and 1.0+ 1.0 kg/ha. After 2 to 3 weeks it was ascertained that the composition, at the application rates 0.25 0.25, 0.25 0.75

ingredient W at the application rate of4 kg/ha and active ingredient Xlll up to 1.0 kg/ha. The composition, at the application rates of 3.0+ I0, I.() 3.0 and 1.0 Xlll potassium salt of 2.4.5-trichlorophenoxypropionic 45 1.0 kg/ha, had better crop plant compatibility than Xll at 4.0 kg/ha.

The results of this experiment are given below:

Active ingredient IV kg/ha 0.25 0 5 0.75 1.0 2.0 3.0 4.0

Oryza sativa 0 0 0 0 0 0 0 Bidens pilosa 20 30 40 50 85 I00 I00 Cyperus esculentus I5 35 50 75 90 I00 Cyperus rotundus I0 20 40 80 98 I00 Alisma plantago 80 80 95 Active ingredient Xlll kg/ha 0.25 0 5 0.75 1.0 2.0 3.0 4.0

Oryza sativa 0 0 0 0 5 I0 25 Bidens pilosa I0 20 25 30 50 80 I00 Cyperus csculentus 3 5 .h It) I5 lb 30 Cyperus rotundus 0 2 5 5 l0 I2 20 Alisma plnntago I5 25 40 50 (i0 )0 Active ingredient l\' XIII kg/htt 0.25 +0.25 0.75 40.25 0.25 +0.75

Oryza sativa 0 0 0 Bidens pilosa (15 )0 Cyperus esculentus 55 75 60 Cyperus rotundus 40 (t5 50 Alisma plumage X0 )5 I00 Active ingredient W X111 kg/ha 3.0+l .0 1.0+3.0 1 .0+1.0

Oryza saliva 0 Bidens pilosa 100 100 100 Cyperus esculentus 100 100 95 Cyperus rotundus 100 95 90 Alisma plantago 100 100 100 0 no damage 100 complete destructiun EXAMPLE 17 1 claim:

In the greenhouse various plants were treated at a growth height of 2 to 25 cm with the following amounts of the following active ingredients and compositions thereof as aqueous so1utions:

diethanolamine salt of 3-isopr,opyl-2,1,3-benzothiadiazinone- After 2 to 3 weeks it was ascertained that the compositions had a better herbicidal action than their individual components, combined with the same good crop plant compatibility.

The results are given below:

1. A selective herbicide composition containing a herbicidally effective amount of a mixture of a. a compound having the formula l O CH- COOR where X denotes chlorine or methyl, Y denotes chlorine or hydrogen, R denotes hydrogen or methyl, R denotes hydrogen, an alkyl radical or an alkoxy alkyl radical, or a carboxylic acid salt thereof and acompound having the formula i-R N O r H wh e re R denotes methyl, ethyl. propyl or isopropyl, or

0 no damage 100 complete destruction Active ingredient 1V Vlll kg/hu 0.25 0.5 0.75 1.0 0.25 0.5 0.75 1.0

Zea mays 0 0 0 0 0 0 0 0 Gulium uparine 25 65 15 30 40 Matricaria maritima 15 35 50 70 10 15 20 25 Lamium amplexicaule 6 I0 25 35 10 15 2O 25 Cyperus esculentus I5 25 35 50 3 5 8 10 Cyperus rotundus 10 20 30 40 0 4 7 9 Active ingredient lX Xl kg/ha 0.25 0.5 0.75 1.0 0.25 0.5 0.75 1.0

Zea mays 0 O 0 0 O 0 0 0 Galium aparine 20 30 35 70 5 10 15 20 Matricaria maritima 15 2O 25 40 5 10 15 25 Lamium amplexicaule 15 25 35 20 3O 60 80 Cyperus esculentus 0 5 10 15 5 10 15 2O Cyperus rotundus 5 10 18 25 5 10 14 15 Active ingredient [V Vlll kg/ha 0.25 +0.25 0.75-10.25 0 25+0.75

Zea mays 0 0 0 Galium aparine 75 97 95 Matricaria maritima 98 Lamium amplexicaule 47 70 66 Cyperus esculentus 55 78 6O Cyperus rotundus 50 7O 55 Active ingredient 1V [X kg/hn 0.25-+0.25 0.75+0.25 0.25+O.75

Zea mays O 0 0 Galium aparine 100 100 Matricaria maritima 7O 95 Lamium amplexicaule 50 80 85 Cypcrus esculentus 55 70 60 Cyperus rotundus 64 76 67 Active ingredient 1V Xl kg/hu 0.25+0.25 0 75-1025 0.25+O.75

Zea mays O 0 0 (jnlium apurinc 70 85 75 Matricuria maritima 65 7O Lumium umplexicaulc 60 86 95 Cypcrus esculentus 55 75 65 Cyperus rotundus 50 70 55 a salt thereof in a weight ratio of 1:5 to :l.

2. A process for controlling the growth of unwanted plants among crop plants which comprises treating the loci of said plants with a herbicidally effective amount of a selective herbicide mixture of S a. a compound having the formula I 01 o-cu-cooa where X denotes chlorine or methyl, Y denotes chlorine or hydrogen, R denotes hydrogen or methyl, R denotes hydrogen, an alkyl radical or an alkoxy radical, or a salt of carboxylic acid, and

b. a compound having the formula where R denotes methyl, ethyl, propyl or isoproypl, or a salt thereof in a weight ratio of 1:5 to 5:1.

3. A process as claimed in claim 2 wherein the weight ratio is 1:3 to 3:l.

4. A process as claimed in claim 2 wherein compound a is the dimethylamine salt of (ll-(2,4- dichlorophenoxy)-propionic acid, the dimethylamine salt of a-(2-methyl-4-chlorophenoxy)-propionic acid, 2,4-dichlorophenoxyacetic acid, the sodium salt of 2- methyl-4-chlorophenoxyacetic acid, isooctyl 2,4,5- 3 trichlorophenoxypropionate, amyl 2,4,5-trichlorophenoxyacetate, the dimethylamine salt of dioxide, 3-ethyl-2.l ,3-benzothiadiazinone-(4)-.'Z.3- dioxide. Z-methyl-2,l,3-benzothiadiazinone-(4)-2 2- dioxide. the sodium salt of 3-isopropyl-2,l,3-

benzothiadiazinone-(4)-2,2-dioxide, the 2-chloroethyl trimethylammonium salt of 3-isopropyl-ll ,3- benzothiadiazinone-(4)-2,2-dioxide, the Z-chloroethyltrimethylammonium salt of B-ethyl-Z, l ,3- benzothiadiazinone-(4)-2,2-dioxide, the triethylammonium salt of 3-propyl-2, l ,3-benzothiadiazinone-(4 2,2-dioxide, the sodium salt of 3-ethyl-2,l,3- benzothiadiazinone-(4)-2,2-dioxide, the sodium salt of 3-propyl-2,l,3-benzothiadiazinone-(4)-2,2-dioxide, 3- isobutyl-2,l,3-benzothiadiazin0ne-(4)-2,2-dioxide or 3-isopropyl-2,l,3-benzothiadiadiazinone-(4)-2,2 dioxide or the dimethylamine or diethanolamine salt thereof.

6. A composition as claimed in claim 1 wherein the weight ratio is 1:3 to 3:1.

7. A composition as claimed in claim 1 wherein compound a is the dimethylamine salt of (ll-(2,4- dichlorophenoxy)-propionic acid, the dimethylamine salt of a-(2-methyl-4-chlorophenoxy)-propionic acid, 2.4-dichlorophenoxyacetic acid, the sodium salt of 2- niethyl 4-chlorophenoxyacetic acid, isooctyl 2,4,5- trichlorophenoxypropionate, amyl 2,4.5-trichlorophenoxyacetate, the dimethylamine salt of 2.4-(dichlorophenoxy)acetic acid, the sodium salt of 2-(2,4-dichlorophenoxy)propionic acid, the sodium salt of Z,4-dichlorophenoxyacetic acid. the dimethylamine salt of 2,4,5-triehlorophenoxyacetic acid, the di methylamine salt of 2-methyl-4-chlorophenoxyacetic acid, the diethanolamine salt of 2-(2-methyl4- chlorophenoxy)-propionic acid, isooctyl 2-(2,4- dichlorophenoxy)propionate, or the potassium salt of 2,4,5-trichlorophenoxypropionic acid.

8. A composition as claimed in claim 7 wherein compound b is 3-propyl2.l ,3-benzothiadiazinone-( il-2,2- dioxide, 2-ethyl-2, l ,3-benzothiadiazinone-l 4 )-2,2 dioxide, Z-methyl-Z, l ,3henzothiadiazinone-( 4 )-2,2- dioxide, the sodium salt of 3-isopropyl-ll .3- benzothiadiazinone-(4)2,2-dioxide, the 2-ehloroethyltrimethylammonium salt of 3-isopropyl- 2,1,3henzothiadiazinone-(4)-2,2-dioxidc, the 2- chloroethyltrimethylammonium salt of 3-ethyl-2,l,3- benzothiadiazinone-(4)-2,2-dioxide, the triethylammonium salt of 3-propyl-2,l,3-benzothiadiazinone(4) 2,2-dioxide, the sodium salt of 3-ethyl-2,l,3- benzothiadiazinone-(4)-2,2-dioxide, the sodium salt of 3-propyl-2,l,3benzothiadiazinone-(4)-2,2-dioxide. 3- isobutyl-2,l,3benzothiadiazinone-(4)-2,2-dioxide, or 3-isopropyl-2,l,3-benzo thiadiazinone-(4)-2,2-dioxide or the dimethylamine or diethanolamine salt thereof. 

1. A SELECTIVE HERBICIDE COMPOSITION CONTAINING A HERBICIDALLY EFFECTIVE AMOUNT OF A MIXTURE OF A. A COMPOUND HAVING THE FORMULA
 2. A process for controlling the growth of unwanted plants among crop plants which comprises treating the loci of said plants with a herbicidally effective amount of a selective herbicide mixture of a. a compound having the formula
 3. A process as claimed in claim 2 wherein the weight ratio is 1:3 to 3:1.
 4. A process as claimed in claim 2 wherein compound a is the dimethylamine salt of Alpha -(2,4-dichlorophenoxy)-propionic acid, the dimethylamine salt of Alpha -(2-methyl-4-chlorophenoxy)-propionic acid, 2,4-dichlorophenoxyacetic acid, the sodium salt of 2-methyl-4-chlorophenoxyacetic acid, isooctyl 2,4,5-trichlorophenoxypropionate, amyl 2,4,5-trichlorophenoxyacetate, the dimethylamine salt of 2,4-dichlorophenoxyacetic acid, the sodium salt of 2-(2,4-dichlorophenoxy)propionic acid, the sodium salt of 2,4-dichlorophenoxyacetic acid, the dimethylamine salt of 2,4,5-trichlorophenoxyacetic acid, the dimethylamine salt of 2-methyl-4-chlorophenoxyacetic acid, the diethanolamine salt of 2-(2-methyl-4-chlorophenoxy)-propionic acid, isooctyl 2-(2,4-dichlorophenoxy)-propionate, or potassium salt of 2,4,5-trichlorophenoxypropionic acid.
 5. A process as claimed in claim 4 wherein compound b is 3-propyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide, 3-ethyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide, 2-methyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide, the sodium salt of 3-isopropyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide, the 2-chloroethyltrimethylammonium salt of 3-isopropyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide, the 2-chloroethyltrimethylammonium salt of 3-ethyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide, the triethylammonium salt of 3-propyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide, the sodium salt of 3-ethyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide, the sodium salt of 3-propyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide, 3-isobutyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide or 3-isopropyl-2,1,3-benzothiadiadiazinone-(4)-2,2-dioxide or the dimethylamine or diethanolamine salt thereof.
 6. A composition as claimed in claim 1 wherein the weight ratio is 1:3 to 3:1.
 7. A composition as claimed in claim 1 wherein compound a is the dimethylamine salt of Alpha -(2,4-dichlorophenoxy)-propionic acid, the dimethylamine salt of Alpha -(2-methyl-4-chlorophenoxy)-propionic acid, 2,4-dichlorophenoxyacetic acid, the sodium salt of 2-methyl-4-chlorophenoxyacetic acid, isooctyl 2,4,5-trichlorophenoxypropionate, amyl 2,4,5-trichlorophenoxyacetate, the dimethylamine salt of 2,4-(dichlorophenoxy)acetic acid, the sodium salt of 2-(2,4-dichlorophenoxy)propionic acid, the sodium salt of 2,4-dichlorophenoxyacetic acid, the dimethylamine salt of 2,4,5-trichlorophenoxyacetic acid, the dimethylamine salt of 2-methyl-4-chloRophenoxyacetic acid, the diethanolamine salt of 2-(2-methyl4-chlorophenoxy)-propionic acid, isooctyl 2-(2,4-dichlorophenoxy)propionate, or the potassium salt of 2,4,5-trichlorophenoxypropionic acid.
 8. A composition as claimed in claim 7 wherein compound b is 3-propyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide, 2-ethyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide, 2-methyl-2,1, 3benzothiadiazinone-(4)-2,2-dioxide, the sodium salt of 3-isopropyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide, the 2-chloroethyltrimethylammonium salt of 3-isopropyl-2,1, 3benzothiadiazinone-(4)-2,2-dioxide, the 2-chloroethyltrimethylammonium salt of 3-ethyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide, the triethylammonium salt of 3-propyl-2,1,3-benzothiadiazinone(4)-2,2-dioxide, the sodium salt of 3-ethyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide, the sodium salt of 3-propyl-2,1,3benzothiadiazinone-(4)-2,2-dioxide, 3-isobutyl-2,1,3benzothiadiazinone-(4)-2,2-dioxide, or 3-isopropyl-2,1,3-benzo thiadiazinone-(4)-2,2-dioxide or the dimethylamine or diethanolamine salt thereof. 